Unless you're building another JS, it'd be nice if there were other companies so heavily invested in it. There's a lot out there beyond compiler prototypes and high speed financial trades, but there's not enough talk of people using ocaml for those things.
Ocaml was (historically, at least) used by Facebook for basically all of their linter/compiler/type checker work. The hack checker was in Ocaml, as was the JS thing (flow, maybe?).
So that does seem to be a good use-case for the language.
That was why I mentioned compilers along with HFT. Rust was originally an ocaml based compiler too.
I don't build HFTs and my compilers are just for fun. None of my day jobs have ever been a situation where the smaller ecosystem and community of ocaml was offset by anything ocaml did better than the selected options like .net, Java, go, rails, C or anything else I've touched. Heck, I've written more zig for an employer than ocaml, and that was for a toy DSL engine that we never ended up using.
